Improvement in cutter-heads



S. P. RANDGLPH.

Butter-Head.

No 165,868, Patentedluly 20,1875.

, Amnusvs.

N. PETERS PNOTO-UTHOGRAPHER. WASHING'IOH, o c

SIMON P. RANDOLPH, OF TEELAMA, OKLIFORNIA.

IMPROVEMENT IN CUTTER-HEADS.

Specification forming part of Letters Patent No. 165,868., dated July20, 1875; application filed March 20, 1875.

To all whom it may concern Be it known that I, SIMON P. RANDOLPH, ofTehama, in the countyof Tehama and State of California, have invented anew and useful Improvement in Gutter-Heads, of which the following is aspecification:

in the accompanying drawing, Figure 1 represents a side view of acutter-head with my improved matching cutter or knife; Fig. 2, aperspective view of the cutter. Figs. 3 and 4 are perspective views ofmodified shapes of cutters, as used respectively for tonguing andgrooving the boards; and Fig. 5 shows the same principle applied to asaw-tooth.

Similar letters of reference indicate correspondin g parts.

Myinven ion relates to an improved matching cutter or knife forrabbeting-machines, by which a great amount of work may be accomplishedwithout requiring frequent sharpening for keeping the grooves andtongues in proper size. The knives make a clean out without splinteringthe edge, and may be applied to any kind of cutter-head in use withoutdifliculty.

The invention will first be described in connection with drawing, andthen pointed out in the claim.

In the drawing illustrating invention, A represents my improved matchingcutter or knife, which is curved at the forward end, and made with twolips, B, for cutting the groove part of the matching boards. The

forward curve of the cutter causes the cutting-edge to strike the woodsquare and avoid scraping. The shape of the cutting-edge is angular, asin Figs. 2 and 3, or it maybe rounded off, as in Fig. 4, according tothe form of the tongue and groove desired to be produced. This shape ofcutters requires less frequent resharpening, as the cuttingedge, inwearing out, retains the size of the tongue and groove to be cut, whilein the old style of cutters the tongue would get larger and the groovesmaller with the dulling of the edge. These curved and lip-shapedcutters A A A A cut readily in cross grained or knotty timber withoutslivering the edge or choking the machine. The cutters may be runefl'ectively for considerable length of time, cutting at both edges andat the point, and requiring less attendance and skill, when once set inthe cutter-head, than the present matching-knives.

The same shape of cutter, having front part curved or inclined towardthe point of work with cutting side lips, may be employed for saw-teethwith similar advantage, as shown in Fig. 5.

Having thus described my invention, I claim as new and desire to secureby Letters Patent The end-turned matching and flooring cutter A, havingon end side lips and angular edge, as shown and described, for thepurpose specified.

SIMON P. RANDOLPH.

Witnesses:

W. E. GREENE, H. P. (JowLEs.

